I visited this WHS in August 2014. I spent 2 nights here and I wasn't disappointed. Guimaraes has quite a lot to offer for those who decide to visit at leisure. The Guimaraes castle is one of the main landmarks (free entrance) together with the Oliveira Square and Toural Square. I was lucky enough to visit on the first Sunday of the month which meant that the Palace of the Dukes of Braganza was free too. Moreover, there was the local parish feast when I visited which meant that the main churches were in tiptop condition and fully lit. My personal favourite was the Church of St Francis with its over-the-top interior.